ORLANDO, a quiet provincial town in 1950's, when Cape Canaveral and then theme parks transformed it into mushrooming business center. Most people who visit Walt Disney World, Universal Studios Escape and Sea World, choose to stay at one of the countless motels along Highway 192, south or southwest of town. But don't choose to ignore the city itself. It is a lovely place with some nice attractions of its own. The fantastic Orlando Museum of Art houses collections of Columbian artifacts with figurines from Peru, African art and American Paintings from the 19th and 10th centuries.